Protection mechanism failure in Mozilla products - CVE-2026-92039
Published: September 15, 2026
Vulnerability identifier: #VU150063
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92039
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass security mitigations.
The vulnerability exists due to a protection mechanism failure in the DOM: Notifications component when processing input. A remote attacker can process input to bypass security mitigations.
Affected software
Firefox for Android
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
How to mitigate CVE-2026-92039
Install security update from vendor's website.
Firefox for Android - update to 156.0
Mozilla Firefox - update to 156.0
Firefox ESR - update to 153.3.0
Mozilla Firefox - update to 156.0
Firefox ESR - update to 153.3.0